The signal output instructions Single signal output. Effective signal output for low level. Output low level and signal light will on when there has voice. Can be used for sonic lamp, with photosensitive sensors act as sound and light alarm, also can be used in the occasion of voice control and sound detection. Circuit boards output switch.
- Main chip: LM393.
- Indication: LED Indicator.
- Input voltage: 4 volt to 9 volt DC.